Method for separating phenols compounds from phenol-containing raw material oil

A technology of phenolic compounds and raw oil, which is applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of serious corrosion, complexity, and high energy consumption of equipment, and reduce sewage discharge, improve the environment, The effect of low energy consumption

Active Publication Date: 2008-03-19
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is relatively complicated, and the use of strong alkali to operate at a highe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 2

[0023] Mix 100g of raw material 2 with saturated aqueous ammonia solution, the volume ratio of oil agent is 1:5, the reaction temperature is 35°C, and the contact time is 25 minutes, and the two phases are separated. The obtained ammonium salt aqueous solution containing the phenolic compound was passed into carbon dioxide at 25° C., the ammonium salt of the phenolic compound was decomposed, and the phenolic compound, namely crude phenol, was liberated, and the yield of the crude phenol was 95%. Carbon dioxide and ammonia and NH 4 + Form NH 4 HCO 3 , When the pH value reaches 6.5, stop introducing carbon dioxide. Will NH 4 HCO 3 The aqueous solution is heated to 85℃, NH 4 HCO 3 It is decomposed into ammonia and carbon dioxide gas. Ammonia is dissolved in water and carbon dioxide is discharged. When the pH value of the solution reaches 10, the heating is stopped. Carbon dioxide and ammonia are recycled.

Example Embodiment

[0024] Example 3

[0025] According to Example 1, the saturated ammonia water was used with 10% by weight ammonia solution, the volume ratio of the raw material to the ammonia solution was 1:6, and the reaction was carried out at 25°C for 20 minutes. The phenolic compounds in the raw material reacted with ammonia to form ammonium salt. , Removed from the raw materials, dissolved in ammonia solution, separated the oil phase and water phase. Then, carbon dioxide gas is introduced into the water phase at the same temperature, the ammonium salt of the phenolic compound is decomposed, and the phenolic compound, namely crude phenol, is freed, with a yield of 95%. Carbon dioxide and ammonia and NH 4 + Form NH 4 HCO 3 , When the pH value reaches 7, stop the introduction of carbon dioxide. Heat the water phase to 75℃, NH 4 HCO 3 It is decomposed into ammonia and carbon dioxide gas. Ammonia is dissolved in water and carbon dioxide is discharged. When the pH value of the solution reaches 11...

Example Embodiment

[0026] Example 4

[0027] According to Example 3, the aqueous ammonia solution is 25wt%, the volume ratio of the raw material to the aqueous ammonia solution is 1:3, the reaction temperature is 15°C, and the reaction time is 30 minutes. The phenolic compounds in the raw materials react with ammonia to form ammonium salts. It is removed and dissolved in ammonia solution to separate the oil phase and water phase. Then, carbon dioxide gas is introduced into the water phase at the same temperature, the ammonium salt of the phenolic compound is decomposed, and the phenolic compound, namely crude phenol, is freed, with a yield of 96%. Carbon dioxide and ammonia and NH 4 + Form NH 4 HCO 3 . When the pH reaches 6.5, stop the introduction of carbon dioxide. Heat the water phase to 65℃, NH 4 HCO 3 It is decomposed into ammonia and carbon dioxide gas. Ammonia is dissolved in water and carbon dioxide is discharged. When the pH value of the solution reaches 10, the heating is stopped. Carbon ...

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Abstract

The invention relates to a method which separates a phenolic compound from raw oil containing phenol. Under a certain condition, the raw oil containing the phenol is mixed with saturated aqueous ammonia for reaction, the phenol and ammonia form ammonium salt which is dissolved in aqueous phase, the phenol is separated from the raw oil, and liquid is divided into two layers, that is, oil phase is separated from the water phase. Carbon dioxide directly enters into ammonium salt aqueous solution, the carbon dioxide reacts on ammonium salt, so that ammonia bicarbonate is formed, and crude phenol is dissociated. The method of the invention can improve the erosion of devices and discharge of sewage and reduce energy consumption, and operation is simple. The method of the invention is applied to producing crude phenol from all raw oils containing phenol.

Description

technical field [0001] The invention relates to a method for removing phenols from phenol-containing materials, that is, a method for separating phenolic compounds from phenol-containing raw material oil. Background technique [0002] The raw material oil for the production of phenolic compounds by the separation method is mainly coal tar, and the coal tar is distilled to cut phenolic oil fractions, and then the phenolic compounds and hydrocarbon oils are separated. In the prior art, the industrial production of separating phenol from coal tar mainly adopts the acid-base elution technology, the principle is to utilize the weak acidity of phenolic compounds to react with sodium hydroxide or potassium hydroxide to form sodium hydroxide which is easily soluble in water. Salt or potassium salt solution is transferred from the tar phase to the water phase to achieve the purpose of separation and recovery. Its process engineering is to use excess sodium hydroxide or potassium hyd...

Claims

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Application Information

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IPC IPC(8): C07C37/68C07C39/00
Inventor 苏重时赵桂芳王立言
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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